def write_to(self, io):
"""Writes ERF to file.
:param io: A file path.
"""
out = io
io, path = tempfile.mkstemp()
fnlen = Erf.filename_length(self.fversion)
lstr_iter = iter(sorted(self.localized_strings.items()))
locstr = []
for k, v in lstr_iter:
locstr.append(struct.pack("<L L %ds x" % len(v), k, len(v)+1, v.encode(get_encoding())))
locstr = b''.join(locstr)
keylist = []
for i, co in enumerate(self.content):
pad = 0
max = len(co.resref)
if len(co.resref) > fnlen:
print("truncating filename %s, longer than %d" % (co.resref, fnlen))
max = fnlen
else:
pad = fnlen - len(co.resref)
keylist.append(struct.pack("<%ds %dx L h h" % (len(co.resref), pad),
co.resref.encode(get_encoding()),
i, co.res_type, 0))
keylist = b''.join(keylist)
offset = 160 + len(locstr) + len(keylist) + 8 * len(self.content)
reslist = []
for co in self.content:
reslist.append(struct.pack("< L L", offset, co.size))
offset += co.size
reslist = b''.join(reslist)
offset_to_locstr = 160
offset_to_keylist = offset_to_locstr + len(locstr)
offset_to_resourcelist = offset_to_keylist + len(keylist)
header = struct.pack("8s LL LL LL LL L 116x",
(self.ftype+' '+self.fversion).encode(get_encoding()),
len(self.localized_strings),
len(locstr), len(self.content), offset_to_locstr, offset_to_keylist,
offset_to_resourcelist, self.year, self.day_of_year, self.desc_strref)
os.write(io, header)
os.write(io, locstr)
os.write(io, keylist)
os.write(io, reslist)
for co in self.content:
os.write(io, co.get())
os.close(io)
shutil.copy(path, out)
os.remove(path)
def write(self, io):
header = struct.pack("4s 4s I I I",
self.ftype.encode('ascii'),
self.fvers.encode('ascii'),
self.lang,
len(self),
self.HEADER_SIZE + len(self) * self.DATA_ELEMENT_SIZE)
io.write(header)
offset = 0
strings = []
for i in range(len(self)):
n = self[i]
entries = struct.pack("I 16s I I I I f",
0x1 if len(n) else 0,
b"",
0,
0,
offset if len(n) else 0,
len(n),
0)
io.write(entries)
offset += len(n)
strings.append(n)
io.write(bytearray(''.join(strings), get_encoding()))
def write_tlk(self, io, lang):
header = struct.pack("4s 4s I I I",
b'TLK ',
b'V3.0',
lang,
len(self),
Tlk.HEADER_SIZE + len(self) * Tlk.DATA_ELEMENT_SIZE)
io.write(header)
offset = 0
strings = []
# Always inject Bad Strref
if not self[0]:
self[0] = 'Bad Strref'
for i in range(len(self)):
n = self[i]
entries = struct.pack("I 16s I I I I f",
0x1 if len(n) else 0,
b"",
0,
0,
offset if len(n) else 0,
len(n),
0)
io.write(entries)
if len(n):
offset += len(n)
strings.append(n)
io.write(bytearray(''.join(strings), get_encoding()))
def unpack(source, offset):
"""Parses a gff cexostring."""
source.seek(offset)
length = struct.unpack('I', source.read(4))[0]
pattern = "%ds" % length
data = struct.unpack(pattern, source.read(length))[0].decode(get_encoding())
return NWString(data)
def unpack(source, offset):
"""Parses a gff resref."""
# identify the current position, read and parse the resref, and return to the current position
source.seek(offset)
length = struct.unpack('B', source.read(1))[0]
if length == 0:
val = ''
else:
pattern = "%ds" % length
val = struct.unpack(pattern, source.read(length))[0].decode(get_encoding())
return NWResref(val)
def __init__(self, source):
if isinstance(source, str):
source = ContentObject.from_file(source)
elif not isinstance(source, ContentObject):
raise ValueError("Unsupported source type %s!" % type(source))
self.columns = []
self.rows = []
self.max = None
self.newline = "\n"
self.default = None
self.co = source
data = source.get()
if not isinstance(data, str):
data = data.decode(get_encoding())
self.parse(data)
def __init__(self, source):
if isinstance(source, str):
source = ContentObject.from_file(source)
elif not isinstance(source, ContentObject):
raise ValueError("Unsupported source type %s!" % type(source))
self.columns = []
self.rows = []
self.max = None
self.newline = "\n"
self.default = None
self.co = source
data = source.get()
if not isinstance(data, str):
data = data.decode(get_encoding())
self.parse(data)
def __getitem__(self, i):
"""Get a TLK element. Tlk supports integer indices and
Python slices. Please note that taking a huge slice say a
reverse (tlk[::-1] can be a very costly.
"""
if isinstance(i, slice):
indices = i.indices( len(self) )
n = Tlk(None)
n.ftype = self.ftype
n.fvers = self.fvers
n.lang = self.lang
n.cache = {}
for i in range(*indices):
n.add(**self[i])
return n
if i == 0xffffffff or i >= len(self) or i < 0:
return ""
elif i in self.entries:
return self.entries[i]
elif not self.io is None:
seek_to = self.HEADER_SIZE + i * self.DATA_ELEMENT_SIZE
self.io.seek(seek_to)
data = self.io.read(self.DATA_ELEMENT_SIZE)
temp = struct.unpack("I 16s I I I I f", data)
flags, sound_resref, v_variance, p_variance, offset, size, sound_length = temp
sound_resref = sound_resref
self.io.seek(self.str_offset + offset)
text = self.io.read(size)
try:
text = text.decode(get_encoding()) if flags & 0x1 > 0 else ""
except UnicodeDecodeError as e:
print("Encoding Error: Unable to read entry %d" % i)
text = ""
return text
return ""
def write_tlk(self, io, lang):
header = struct.pack(
"4s 4s I I I", b'TLK ', b'V3.0', lang, len(self),
Tlk.HEADER_SIZE + len(self) * Tlk.DATA_ELEMENT_SIZE)
io.write(header)
offset = 0
strings = []
# Always inject Bad Strref
if not self[0]:
self[0] = 'Bad Strref'
for i in range(len(self)):
n = self[i]
entries = struct.pack("I 16s I I I I f", 0x1 if len(n) else 0, b"",
0, 0, offset if len(n) else 0, len(n), 0)
io.write(entries)
if len(n):
offset += len(n)
strings.append(n)
io.write(bytearray(''.join(strings), get_encoding()))
def load(self):
"""Loads the source of the associated gff file."""
# attempt to open the gff file and load its header
self.source = io.BytesIO(self.co.get())
header = struct.unpack(self.HeaderPattern,
self.source.read(struct.calcsize(self.HeaderPattern)))
if (header[0].decode(get_encoding()).rstrip() == self.filetype
and header[1].decode(get_encoding()) == self.Version):
self.structoffset, self.structcount = header[2:4]
self.fieldoffset, self.fieldcount = header[4:6]
self.labeloffset, self.labelcount = header[6:8]
self.dataoffset, self.datasize = header[8:10]
self.indiceoffset, self.indicesize = header[10:12]
self.listoffset, self.listsize = header[12:14]
else:
if header[1].decode(get_encoding()) != self.Version:
raise ValueError("File: %s: gff file version '%s' does not match current valid version '%s'" % (self.co.get_filename(), header[1], self.Version))
else:
raise ValueError("File: %s: gff file type '%s' does not match specified file type '%s'" % (self.co.get_filename(), header[0].rstrip(), self.filetype))
# position the source file at the struct array and prepare structs list
self.source.seek(self.structoffset)
self.structs = []
# parse the gff struct array
size = struct.calcsize(self.StructPattern)
rd = self.source.read(self.structcount * size)
for chunk in chunks(rd, size):
type, offset, count = struct.unpack(self.StructPattern, chunk)
if offset == 0xffffffff:
self.structs.append([type, -1])
elif count == 1:
self.structs.append([type, offset])
else:
pattern = "%dI" % count
position = self.source.tell()
self.source.seek(self.indiceoffset + offset)
data = self.source.read(struct.calcsize(pattern))
self.source.seek(position)
indexes = struct.unpack(pattern, data)
self.structs.append([type, list(indexes)])
# position the source file at the label array and prepare labels list
self.source.seek(self.labeloffset)
self.labels = []
# parse the gff label array
size = struct.calcsize(self.LabelPattern)
rd = self.source.read(size * self.labelcount)
for chunk in chunks(rd, size):
label = struct.unpack(self.LabelPattern, chunk)[0].decode(get_encoding())
self.labels.append(label.rstrip('\x00'))
# position the source file at the field array and prepare fields list
self.source.seek(self.fieldoffset)
self.fields = []
# parse the gff field array
size = struct.calcsize(self.FieldPattern)
dwordsize = struct.calcsize(self.DwordPattern)
for index in range(0, self.fieldcount):
type, label = struct.unpack(self.FieldPattern,
self.source.read(size))
Type = self.Classes[type]
position = None
# False indicates there is no offset
if not Type.at_offset is False:
offset = struct.unpack('I', self.source.read(4))[0]
position = self.source.tell()
if Type.at_offset == 'data':
offset += self.dataoffset
elif Type.at_offset == 'list':
offset += self.listoffset
if position:
data = Type.unpack(self.source, offset)
self.source.seek(position)
else:
data = Type.unpack(self.source)
type_name = Type.type
label_name = self.labels[label]
self.fields.append([type_name, label_name, data])
# close the source file and build the gff structure, then indicate
# status
self.source.close()
self._structure = self.build_struct(0)
return True
def __init__(self, fname, data_path):
super(Key, self).__init__()
self.root = data_path
self.bif = []
with open(fname, 'rb') as io:
header = io.read(8 + (4 * 6) + 32)
hs = struct.unpack("<4s 4s LLLLLL 32s", header)
self.ftype = hs[0]
self.fvers = hs[1]
bif_count = hs[2]
key_count = hs[3]
offset_to_file_table = hs[4]
offset_to_key_table = hs[5]
self.year = hs[6]
self.day_of_year = hs[7]
reserved = hs[8]
io.seek(offset_to_file_table)
data = io.read(12 * bif_count)
self.file_table = []
for c in chunks(data, 12):
if len(c) != 12: break
size, name_offset, name_size, drives = struct.unpack("LLhh", c)
io.seek(name_offset)
name = io.read(name_size)
name = struct.unpack("%ds" % name_size, name)[0]
name = name.decode(get_encoding())
name = name.rstrip(' \t\r\n\0')
name = os.path.join(self.root, name.replace('\\', os.sep))
name = os.path.abspath(name)
self.bif.append( Bif(self, name) )
self.file_table.append((size, name, drives))
self.key_table = {}
io.seek(offset_to_key_table)
data = io.read(22 * key_count)
for c in chunks(data, 22):
if len(c) != 22: break
resref, res_type, res_id = struct.unpack("<16s hL", c)
resref = resref.decode(get_encoding())
self.key_table[res_id] = (resref.rstrip(' \t\r\n\0'), res_type)
self.fn_to_co = {}
for res_id, (resref, res_type) in self.key_table.items():
bif_idx = res_id >> 20
bif = self.bif[bif_idx]
res_id = res_id & 0xfffff
#print res_id, resref, res_type, bif_idx
if not res_id in bif.contained:
msg = "%s does not have %d" % (bif.io.name, res_id)
raise ValueError(msg)
ofs, sz, _rt = bif.contained[res_id]
o = res.ContentObject(resref, res_type, bif.io, ofs, sz)
fn = o.get_filename()
if fn in self.fn_to_co and self.fn_to_co[fn][2] < bif_idx:
oo, biff, unused = self.fn_to_co[fn]
print("%s, in %s shadowed by file in %s" % (fn, biff.io, biff.io))
self.content.remove(oo)
self.fn_to_co[fn] = (o, bif, bif_idx)
self.add(o)
def write_to(self, io):
"""Writes ERF to file.
:param io: A file path.
"""
out = io
io, path = tempfile.mkstemp()
fnlen = Erf.filename_length(self.fversion)
lstr_iter = iter(sorted(self.localized_strings.items()))
locstr = []
for k, v in lstr_iter:
locstr.append(
struct.pack("<L L %ds x" % len(v), k,
len(v) + 1, v.encode(get_encoding())))
locstr = b''.join(locstr)
keylist = []
for i, co in enumerate(self.content):
pad = 0
max = len(co.resref)
if len(co.resref) > fnlen:
print("truncating filename %s, longer than %d" %
(co.resref, fnlen))
max = fnlen
else:
pad = fnlen - len(co.resref)
keylist.append(
struct.pack("<%ds %dx L h h" % (len(co.resref), pad),
co.resref.encode(get_encoding()), i, co.res_type,
0))
keylist = b''.join(keylist)
offset = 160 + len(locstr) + len(keylist) + 8 * len(self.content)
reslist = []
for co in self.content:
reslist.append(struct.pack("< L L", offset, co.size))
offset += co.size
reslist = b''.join(reslist)
offset_to_locstr = 160
offset_to_keylist = offset_to_locstr + len(locstr)
offset_to_resourcelist = offset_to_keylist + len(keylist)
header = struct.pack("8s LL LL LL LL L 116x",
(self.ftype + ' ' + self.fversion).encode(
get_encoding()), len(self.localized_strings),
len(locstr), len(self.content), offset_to_locstr,
offset_to_keylist, offset_to_resourcelist,
self.year, self.day_of_year, self.desc_strref)
os.write(io, header)
os.write(io, locstr)
os.write(io, keylist)
os.write(io, reslist)
for co in self.content:
os.write(io, co.get())
os.close(io)
shutil.copy(path, out)
os.remove(path)
def from_file(fname):
"""Create an Erf from a file handle.
:param io: A file handle.
"""
with open(fname, 'rb') as io:
header = io.read(160)
hs = struct.unpack("< 4s 4s LL LL LL LL L 116s", header)
ftype = hs[0].decode(get_encoding()).strip()
if not ftype in Erf.TYPES: raise ValueError("Invalid file type!")
fvers = hs[1].decode(get_encoding())
fname_len = Erf.filename_length(fvers)
new_erf = Erf(ftype, fvers)
new_erf.io = fname
lstr_count = hs[2]
lstr_size = hs[3]
entry_count = hs[4]
offset_to_lstr = hs[5]
offset_to_keys = hs[6]
offset_to_res = hs[7]
new_erf.year = hs[8]
new_erf.day_of_year = hs[9]
new_erf.desc_strref = hs[10]
io.seek(offset_to_lstr)
lstr = io.read(lstr_size)
for ls in range(lstr_count):
if len(lstr) == 0:
print(
"locstr table: not enough entries (expected: %d, got: %d)"
% (lstr_count, ls))
break
if len(lstr) < 8:
print(
"locstr table: not enough entries (expected: %d, got: %d)"
% (lstr_count, ls) + " partial data: " + lstr)
break
lid, strsz = struct.unpack("<L L", lstr[:8])
if strsz > len(lstr) - 8:
strsz = len(lstr) - 8
# Necessary for hacking around the fact that erf.exe adds an extra null
# to the end of the description string.
try:
str = struct.unpack("8x %ds" % strsz,
lstr)[0].decode(get_encoding()) #
except struct.error as e:
str = struct.unpack("8x %ds" % (strsz + 1, ),
lstr)[0].decode(get_encoding()) #
new_erf.localized_strings[lid] = str.rstrip(' \t\r\n\0')
lstr = lstr[8 + len(str):]
keylist_entry_size = fname_len + 4 + 2 + 2
io.seek(offset_to_keys)
keylist = io.read(keylist_entry_size * entry_count)
fmt = "%ds I h h" % fname_len
fmt = fmt * entry_count
fmt = '<' + fmt
keylist = struct.unpack(fmt, keylist)
for resref, res_id, res_type, unused in chunks(keylist, 4):
co = res.ContentObject(
resref.decode(get_encoding()).rstrip(' \t\r\n\0'),
res_type, fname)
new_erf.add(co)
resourcelist_entry_size = 4 + 4
io.seek(offset_to_res)
resourcelist = io.read(resourcelist_entry_size * entry_count)
resourcelist = struct.unpack("I I" * entry_count, resourcelist)
_index = -1
for offset, size in chunks(resourcelist, 2):
_index += 1
try:
co = new_erf.content[_index]
co.offset = offset
co.size = size
except IndexError as e:
print(
"WARNING: Attempt to index invalid content object in '%s' at offset %X"
% (fname, offset))
return new_erf
def load(self):
"""Loads the source of the associated gff file."""
# attempt to open the gff file and load its header
self.source = io.BytesIO(self.co.get())
header = struct.unpack(
self.HeaderPattern,
self.source.read(struct.calcsize(self.HeaderPattern)))
if (header[0].decode(get_encoding()).rstrip() == self.filetype
and header[1].decode(get_encoding()) == self.Version):
self.structoffset, self.structcount = header[2:4]
self.fieldoffset, self.fieldcount = header[4:6]
self.labeloffset, self.labelcount = header[6:8]
self.dataoffset, self.datasize = header[8:10]
self.indiceoffset, self.indicesize = header[10:12]
self.listoffset, self.listsize = header[12:14]
else:
if header[1].decode(get_encoding()) != self.Version:
raise ValueError(
"File: %s: gff file version '%s' does not match current valid version '%s'"
% (self.co.get_filename(), header[1], self.Version))
else:
raise ValueError(
"File: %s: gff file type '%s' does not match specified file type '%s'"
% (self.co.get_filename(), header[0].rstrip(),
self.filetype))
# position the source file at the struct array and prepare structs list
self.source.seek(self.structoffset)
self.structs = []
# parse the gff struct array
size = struct.calcsize(self.StructPattern)
rd = self.source.read(self.structcount * size)
for chunk in chunks(rd, size):
type, offset, count = struct.unpack(self.StructPattern, chunk)
if offset == 0xffffffff:
self.structs.append([type, -1])
elif count == 1:
self.structs.append([type, offset])
else:
pattern = "%dI" % count
position = self.source.tell()
self.source.seek(self.indiceoffset + offset)
data = self.source.read(struct.calcsize(pattern))
self.source.seek(position)
indexes = struct.unpack(pattern, data)
self.structs.append([type, list(indexes)])
# position the source file at the label array and prepare labels list
self.source.seek(self.labeloffset)
self.labels = []
# parse the gff label array
size = struct.calcsize(self.LabelPattern)
rd = self.source.read(size * self.labelcount)
for chunk in chunks(rd, size):
label = struct.unpack(self.LabelPattern,
chunk)[0].decode(get_encoding())
self.labels.append(label.rstrip('\x00'))
# position the source file at the field array and prepare fields list
self.source.seek(self.fieldoffset)
self.fields = []
# parse the gff field array
size = struct.calcsize(self.FieldPattern)
dwordsize = struct.calcsize(self.DwordPattern)
for index in range(0, self.fieldcount):
type, label = struct.unpack(self.FieldPattern,
self.source.read(size))
Type = self.Classes[type]
position = None
# False indicates there is no offset
if not Type.at_offset is False:
offset = struct.unpack('I', self.source.read(4))[0]
position = self.source.tell()
if Type.at_offset == 'data':
offset += self.dataoffset
elif Type.at_offset == 'list':
offset += self.listoffset
if position:
data = Type.unpack(self.source, offset)
self.source.seek(position)
else:
data = Type.unpack(self.source)
type_name = Type.type
label_name = self.labels[label]
self.fields.append([type_name, label_name, data])
# close the source file and build the gff structure, then indicate
# status
self.source.close()
self._structure = self.build_struct(0)
return True
def __init__(self, fname, data_path):
super(Key, self).__init__()
self.root = data_path
self.bif = []
with open(fname, 'rb') as io:
header = io.read(8 + (4 * 6) + 32)
hs = struct.unpack("<4s 4s LLLLLL 32s", header)
self.ftype = hs[0]
self.fvers = hs[1]
bif_count = hs[2]
key_count = hs[3]
offset_to_file_table = hs[4]
offset_to_key_table = hs[5]
self.year = hs[6]
self.day_of_year = hs[7]
reserved = hs[8]
io.seek(offset_to_file_table)
data = io.read(12 * bif_count)
self.file_table = []
for c in chunks(data, 12):
if len(c) != 12: break
size, name_offset, name_size, drives = struct.unpack("LLhh", c)
io.seek(name_offset)
name = io.read(name_size)
name = struct.unpack("%ds" % name_size, name)[0]
name = name.decode(get_encoding())
name = name.rstrip(' \t\r\n\0')
name = os.path.join(self.root, name.replace('\\', os.sep))
name = os.path.abspath(name)
self.bif.append(Bif(self, name))
self.file_table.append((size, name, drives))
self.key_table = {}
io.seek(offset_to_key_table)
data = io.read(22 * key_count)
for c in chunks(data, 22):
if len(c) != 22: break
resref, res_type, res_id = struct.unpack("<16s hL", c)
resref = resref.decode(get_encoding())
self.key_table[res_id] = (resref.rstrip(' \t\r\n\0'), res_type)
self.fn_to_co = {}
for res_id, (resref, res_type) in self.key_table.items():
bif_idx = res_id >> 20
bif = self.bif[bif_idx]
res_id = res_id & 0xfffff
#print res_id, resref, res_type, bif_idx
if not res_id in bif.contained:
msg = "%s does not have %d" % (bif.io.name, res_id)
raise ValueError(msg)
ofs, sz, _rt = bif.contained[res_id]
o = res.ContentObject(resref, res_type, bif.io, ofs, sz)
fn = o.get_filename()
if fn in self.fn_to_co and self.fn_to_co[fn][2] < bif_idx:
oo, biff, unused = self.fn_to_co[fn]
print("%s, in %s shadowed by file in %s" %
(fn, biff.io, biff.io))
self.content.remove(oo)
self.fn_to_co[fn] = (o, bif, bif_idx)
self.add(o)
def unpack(source, offset):
"""Parses a gff cexolocstring."""
# identify the current position, read and parse the cexolocstring, and return to the current position
position = source.tell()
source.seek(offset)
length, stringref, count = struct.unpack('IiI', source.read(12))
result = []
if count > 0:
for substring in range(0, count):
id, length = struct.unpack('2I', source.read(8))
pattern = "%ds" % length
data = struct.unpack(pattern, source.read(struct.calcsize(pattern)))[0].decode(get_encoding())
result.append([id, data])
source.seek(position)
return NWLocalizedString(stringref, result)
def from_file(fname):
"""Create an Erf from a file handle.
:param io: A file handle.
"""
with open(fname, 'rb') as io:
header = io.read(160)
hs = struct.unpack("< 4s 4s LL LL LL LL L 116s", header)
ftype = hs[0].decode(get_encoding()).strip()
if not ftype in Erf.TYPES: raise ValueError("Invalid file type!")
fvers = hs[1].decode(get_encoding())
fname_len = Erf.filename_length(fvers)
new_erf = Erf(ftype, fvers)
new_erf.io = fname
lstr_count = hs[2]
lstr_size = hs[3]
entry_count = hs[4]
offset_to_lstr = hs[5]
offset_to_keys = hs[6]
offset_to_res = hs[7]
new_erf.year = hs[8]
new_erf.day_of_year = hs[9]
new_erf.desc_strref = hs[10]
io.seek(offset_to_lstr)
lstr = io.read(lstr_size)
for ls in range(lstr_count):
if len(lstr) == 0:
print("locstr table: not enough entries (expected: %d, got: %d)" % (lstr_count, ls))
break
if len(lstr) < 8:
print("locstr table: not enough entries (expected: %d, got: %d)" % (lstr_count, ls) + " partial data: " + lstr)
break
lid, strsz = struct.unpack("<L L", lstr[:8])
if strsz > len(lstr) - 8:
strsz = len(lstr) - 8
# Necessary for hacking around the fact that erf.exe adds an extra null
# to the end of the description string.
try:
str = struct.unpack("8x %ds" % strsz, lstr)[0].decode(get_encoding()) #
except struct.error as e:
str = struct.unpack("8x %ds" % (strsz + 1,), lstr)[0].decode(get_encoding()) #
new_erf.localized_strings[lid] = str.rstrip(' \t\r\n\0')
lstr = lstr[8 + len(str):]
keylist_entry_size = fname_len + 4 + 2 + 2
io.seek(offset_to_keys)
keylist = io.read(keylist_entry_size * entry_count)
fmt = "%ds I h h" % fname_len
fmt = fmt * entry_count
fmt = '<' + fmt
keylist = struct.unpack(fmt, keylist)
for resref, res_id, res_type, unused in chunks(keylist, 4):
co = res.ContentObject(resref.decode(get_encoding()).rstrip(' \t\r\n\0'),
res_type, fname)
new_erf.add(co)
resourcelist_entry_size = 4 + 4
io.seek(offset_to_res)
resourcelist = io.read(resourcelist_entry_size * entry_count)
resourcelist = struct.unpack("I I" * entry_count, resourcelist)
_index = -1
for offset, size in chunks(resourcelist, 2):
_index += 1
try:
co = new_erf.content[_index]
co.offset = offset
co.size = size
except IndexError as e:
print("WARNING: Attempt to index invalid content object in '%s' at offset %X" % (fname, offset))
return new_erf
